GSA 300 Equivalent & Substitute Parts

Part Overview

The GSA 300 is a 300 mA ceramic cartridge fuse rated for 250 V AC with slow-blow response characteristics. Manufactured by Bel Fuse Inc., this component is designed for applications requiring overcurrent protection in AC circuits. The GSA 300 is classified as obsolete, making identification of compatible substitute parts essential for system maintenance and component replacement in existing installations.

Substiute Parts

GSA 300

Bel Fuse Inc.In Stock: 866GSA 300 Datasheet

Current PartRFQ

0326.300HXP

Littelfuse Inc.In Stock: 10150326.300HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GSA 300 is determined by the following critical parameters:

• Current Rating: Must be 300 mA
• Voltage Rating - AC: Must be 250 V minimum
• Fuse Type: Must be Cartridge, Ceramic
• Response Time: Must be Slow Blow
• Package / Case: Must be 3AB, 3AG, 1/4" x 1-1/4" form factor
• Mounting Type: Must require holder compatibility
• Operating Temperature Range: Must support -55°C ~ 125°C

The substitute part 0326.300HXP from Littelfuse Inc. meets all these criteria, providing functional equivalence for the obsolete GSA 300.

Parameter Comparison

Engineering Selection Recommendations

The 0326.300HXP from Littelfuse Inc. is the qualified substitute for the obsolete GSA 300. Both components share identical current ratings, AC voltage ratings, response characteristics, and package specifications. The substitute part maintains all required certifications (CE, CSA, UL) and operates within the same temperature range.

The 0326.300HXP offers additional advantages in terms of product status (Active vs. Obsolete) and regulatory compliance (ROHS3 Compliant vs. RoHS non-compliant). The substitute part also provides enhanced breaking capacity specifications and is currently in active production with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 0326.300HXP directly replace the GSA 300 in existing installations?

A: Yes. Both components are 300 mA ceramic cartridge fuses with 250 V AC ratings, slow-blow response, and identical 3AB/3AG package specifications. Physical dimensions are equivalent within manufacturing tolerances.

Q: What is the significance of the DC voltage rating difference?

A: The GSA 300 does not specify a DC voltage rating, while the 0326.300HXP is rated for 125 V DC. For AC-only applications, this difference is not relevant. For circuits requiring DC protection, the 0326.300HXP provides additional capability.

Q: Are there compatibility concerns with existing fuse holders?

A: No. Both components use the 3AB, 3AG, 1/4" x 1-1/4" form factor and require holder mounting. Physical dimensions are compatible with standard 3AG fuse holders.

Q: Why is the melting I²t value different between the two parts?

A: The melting I²t value (0.69 for 0326.300HXP vs. 1.85 for GSA 300) indicates different thermal response characteristics. The 0326.300HXP exhibits faster thermal response. Both maintain slow-blow classification and are suitable for their intended applications.

Q: What is the impact of RoHS compliance differences?

A: The GSA 300 is RoHS non-compliant, while the 0326.300HXP is ROHS3 compliant. For new designs or systems subject to RoHS regulations, the 0326.300HXP is the appropriate selection.

Q: Are both parts currently available for procurement?

A: The GSA 300 is obsolete. The 0326.300HXP is in active production with confirmed inventory availability, making it the practical choice for component replacement and new procurement.